Rattle off Definition 1 of 2Pro Tip 1/3Speed Implication Emphasizes swift recitation, implying skill or familiarity with the topic. During the quiz show, he managed to rattle off answers rapidly. Pro Tip 2/3Informal Setting Commonly used in casual conversation, not in formal writing or speeches. At the party, she could rattle off all the celebrity gossip. Pro Tip 3/3Confidence Indicated The speaker usually sounds sure of themselves when they rattle off information. He confidently rattled off his extensive travel experiences.